Internal-combustion engine.



W. BURNELL. INTERNAL GOMBUS'IION ENGINE.

APILIGATION FILED JAN. 1B, 190D.

Patented Aug. 3, 1909 -saisi/n f :initiaux l llllllllll d WAL'IER BURNLL, OF WES'ION-SUPER-MA I tE, ENGLAND.

INTERI'AIi-OOHBUSTION ENGINE.

No. essenze@ Sp-ecation ci! Lettera Patenti. Appiioaiimi ined sammy 1e, 199s. semi No. 472,106.

Patented Ang. 3, 1909.

To all 'whom fit 'ma/y concem: l

Be it Imown that I, WALTER Bmilmul, ii. sub'eet of the King of Great Britain sind Ire and, residing nl', 3 Ashcombe Park, Wes- 5 ton-super-Mnre, iii the county of Somerset,

England, have mede e new and useful-Improvement :in Internal-Combustion Engines, of which the following is n full und complete specification. This invention relates to interna-l combuef tion engines of the twoynle t pe in which iidisplacer cylinder` is employe and it; consists of .tl1e improved construction li'ereiiiafter s cied whereby the construction is 16 sii'npliil and the number ofpnrls reduced,

.tliqe object beingto pose iiit'o the workin r cylinder e charge of 'nir in ndviiriee ol'- the ciinrge ofexplosive mixture of gus und iiir so as in more effectinilly soiivenge the workin" cyl- 20 iiider of tlie exliiiustgnses without. the loess of finy of the gaseous niidure.A According lo the pre-seiitiiivenlion tliefdi'splacer cylinder is connectedwith the wor nig cylinder by n single port or passage and is rovided wil-li :iii induction pipe fit-ted lwi i mi inlet vulve for lelie admission of the gaseous mixture, the nrriiiw'enieni of the singlo port. orvpassiige nii'd tlie relative iiiovements of the pistons of the two cylinders beii'iig such that during n predetermined eriod `o the suction elrolie of the piston of lie displiicer cylinder the port or nseiigc between the two cylinders is closed y the piston ol' 'llicfrorking cylinder so llnil. giisedus mix- ,tfiire is 4driiwii linln llie. disilneer -tyliiidm llirongli llie inlvl ridi'e ot the. induction pipe., iiiid din-ing llio rrniniin'lor of llie suction slrolci'. 0i' .sind piston llie poi-l. or pnssii fe between llie two cylinders is opened Il v l ie 40 piston nl'. the working eyliiidersn iis lo [duce` I Suid izissiigv in eiiniuiuiiieadioii willi tliel'orwim end oi llie working cylinder which is open .lo the elii'iosphere through ii .snilnhle opening, whereupon lhe inlel. vulve in llie iiiduction pi ie closes und during the reiiuiiiidi-.r

of the snciion stroke of the piston of the displncer cylinder nir :done is 'drown into the .seid cylinder so that when l'lie 'port or pus-- `enge bewoeii the cylinders is opened iis llupiston of the working cylinder reii'elies llic -eii'd of its working stroke the iiir )ninos into the said e liiidelr iii edvuiioe ofi die gaseous mixture Vand thun senreuges. the cylinder vwithout the loss of any gall,

In the fiocoinpiiiiyiiig drawing which illus-V ytriitee thisinventon :-1*`igiire l is ii view iii sectional eleiriition showing the piston ol the power cylinder .nt the commencement. of ils` placer cylinder approaching the end of its suction stroke; Fi v. 2 is n similiir view showing the pistou o? the power cylinderiiip'- pronchiiig l'lie end of its workii'ig sl'roliejiilid nuire tliiiii half-way on its i'liseliiirgiiig piston ofi' e lower cilinder :il lheend oi' ils working' smilie sind the pistou nl" llie displuror cylinder nppronehiiigry the eoinplelion nl ils dnaehnrgiiig' isl'rohe; sind l"i; al in ii sini in r view shun-'ing the piston 'of the power icrliiider npprourliiiigI llie. eiid of its roiii iiission stroke iind the pis-lon of llie'disp neer cylinder rullini' more tluiii half-wily on ilssuction stroke.

lliroiiglioiit the views siniiliir pnrts nre niiirked willi like letters of ref ereiiee. '.llie working vyliiidrr u hiisllie iisuiil exliiiiisl port a lnenled nl. siii-h u position thul il is iiiu-oi'eriiid Iiy the working piston ijnsl before il. ien'elirs l'lir end of' ils fin'ii'urdor working stroke. fllie piston I; of such n length lhul ilUltoei-i not iiiiunrer ilie exliniisl porlV when ij'l's.' nl, llie end nl its inwnrd n r return strokii. ,'llie piston I; in connected lo lhe crunk-pin if* o'l the crunk-slurf( 1: h r :i connor-ting rnlllrl iii the iisinil n'iuniier. 'l'hn iiiirk iiid iii' connut-lion willi t'hrlii'orli'iiii' cylinder fr liy iin-mis of u port ur piisszigii .i the opening nl? which ,into the disphim-r cylinder is' rso lornlvd llinl il is unveiroreriid by the piston f und the opening o siiid piissii e into the working cylinder is su loeided l nit. it is in winuiiiiiiienliou willi the front end of said v rliiidrr when tho piston Y) of the Working lcylinder is nl llii` front rnd of its return slrolui. lhv reliilire positions of the exlinusl purl if' und llie pni'l. o1' ponen-ge faire suoli thiil holh nii-.opened tothe closed end of the w'orl'in'lr cylinder iis llie piston b roliohen llieend ni' ils fnrii'iird or working Stroke, tho exlmiist purl u living uncovered iii iidvnii nl' the pori'- oi pnssnge fr, and when snidp'- ton is id the end of itiiiiiwiird or return stroke the exliiiustport a* is oovei'ed'iind closed by said piston and the port or passiige lf is in open ':niiiiiiuiiicutionwilli 'the front working strokeniid the piston of the dill-- lhepislon of the disidiu-.er cylinder riither- Stroke; .Fiign' is' ii siiiiiliir View slioirii'ig-lhe' tie displnrl-.i' cylinder o is iii end of the working cylinder and therefore with the atmosphere through the opening o in the crank-chamber. As the fr'ont end of the pistonv b does not clear the port or ussage It' when said piston is at the end ot its return stroke a gap or recess b1 is cnt or formed in the front edge of the piston for the purpose of o `leninF said port or passage to the ront en of ille working cylinder. The back end of the piston Za may be fitted with a deflector fot diverting the'air and gaseous mixture'liowing out of the passage toward the back end of the working' cylinder. The induction pipe p from the carbureter l leads into the closed end of the displacer cylinder c and is fitted with an automatic non-return valve j. The piston f of the displacer cylinder is coupled to thecrankpin g1 of the crank-shaft g b a connecting rod /L in the usual manner. he two crankshafts c and g are geared together by spur wheels m and 'n of equal size so that they ro- 'tate et the same speed in opposite directions and said wheels are so meshed that the piston f of the dis lacer cylinder is moving on its suction stro (e during the Whole of the time the passage In is open to the atmosphere through the front end of the working cylinder, so that during the latter part of the said suction stroke air is drawn into the displacer cylinder through the passage la, the e linder a,the crank-chamber l, and hole o, the inlet Valve j closing immediately the vacuum in the cylinder is destroyed by the opening of the assage Itto the atmosphere. A stratum of air is' thereby obtained in the displacer cylinder above the gaseous mixture which .air 1s first discharged into the working cylinder which thus scavenges 1t in advance of the introduction of the gaseous mixture. The valve y may be mechanically operated without departing from the spirit und scope of m invention.

The cycle o operation is as follows:-A Comxnencin with the working stroke of the working cy inder, the piston of said cylinder first closes the passage between the two cylinders to the front end o f the'worklng cylinder and then as it approaches the end of its working stroke it first uncovers the exhaust ort and subsequently opens the assage etwccn the two cVlinders to the liack end of the working cylinder. On the return stroke of the piston of the working c linder it first closes the passa e, between tie two cylinders, next closes t e exhaust port, and as it reaches the end of said stroke 1t opens the passage between the two c hnd'ers to the atmosphere through the ront end 'of the working cylinder. At the end of the return stroke and the commencement of the working stroke of the piston of the working cylinder the piston of the d lsplaeer cylinder is reachm the end of its outer or suction stroke un draws alr lnto the displaeer cylinder through the front end ot' the working cylinder until the port or passage between the two cylinders is closed by the piston o'l the working cylinder. During tluI remainder ol the working lstroke of the piston of the working cylinder the pistou ot the displaeer cylinder-'is making its return or discharge stroke which operates to compress the gaseous nlxture and the air .until the passage between the two cylinders is opened by the piston of the working cylinder which allows first' the air und then the gaseous mixture to ilow into the working cylinder. The air operates to sca-venge the said cylinder and passes out b the exhaust port until said port is closed y the piston of the working cylinder on its return stroke. During the return stroke of thepiston of the working cylinder when the* assage lbetween the two cylinders is closed tlie piston of the displacer cylinder is on its suction stroke drawing in gaseous mixture through the inlet pipe o1' passage u'ntil said piston opens the 'passage between the two cylinders and puts the displacer cylinder into communication with the atmosphere throu h the front end ofthe working cylinder w en the inlet valve closes and air only is drawn into the displacer eyl'nder as before described;

That l claim as my invention and desire lo Secure by Letters stent is '.lhe combination 1n an internal combustion engine of the two-'cycle t pe, of a. working cylinder the front end ofy which iso en to the'atmosphere, a piston in said cylin er an exhaust port located at the forward en of said cylinder so as to be oiened by the piston as it ap roaches the en of its Working stroke, a replacer cylinder, a. piston in said cylinder, a single port or passage between the dis lacer and Working cylinders,

the opening o said port or passa e into the working cylinder being so locate that it is uncovered by the piston of the working cylinder as it approaches the ends of both of its strokes thereby placin the displacer cylinder in communication a ternately with the back und Vfrontends of the working cylinder, and the opening of said port or assage into the displucer cylinder being so ocuted that the piston of said cylinder does not operate as a valve to said port or passa e, a recess in the front edge of the pistone? the working cylinth-.r to coincide with the orifieeof the port or passage between the two cylinders when .smid piston is at the end of its return stroke, cralrlc-shufts to which the pistons of the two cylinders are coupled' by connecting rods, spur wheels on the ltwo crunk-shafts for geariu r Huid shafts Vtogether, the angular-ity o the crank of one shaft with respect to that of the other being such that the piston of the displact-r Cylinder is moving ou its suction stroke during the whole of the time the port or passage In testimony whereof l have signed my between the vtwo cylinders is open to the atname in the presence of two subscribing wit mosphe're through the front end of the Working cylinder, a port or passage in the back l messes. en d of the displacer cylinder for the admis- WAL'IER BURNELI.. sion of the explosive mixture, and a noni `Witnesses:

\V. M. A l Turri N return vnive in Said port or [nu-Huge, as Het IC. A-MILic'rox.

forth. 

